Because people are lazy and if it wasn't easy to use no one would use it.
Yes
It was so easy to ask a question on WikiAnswers.
WikiAnswers is so successful because it's a community based question and answer site. Anyone is allowed to answer and add questions. It is popular among people, because it's free and easy to use.
wikianswers is for quick easy answers. For info on a big subject you can go to wikipedia.com
it isnt, you need to get the hang of it, it is suppose to be really easy.
This was a question on Wikianswers so you have learned how easy it is. If you had spelled Wikianswers correctly it might have even matched a question asked previously
Anyone can use WikiAnswers that knows about WikiAnswers.
It is extremely easy to contribute to WikiAnswers. There are big ask and answer bars to answer and ask questions, and pretty much everything you need to contribute it laid out before you on WikiAnswers.
No, it is not if you know how to use it properly.
No, it is not easy. There are only a few Bug Catchers on WikiAnswers, as it requires frequent and quality bug reports.
Currently, WikiAnswers' popularity and use is skyrocketing, so the retiring of happen any time soon.
You cannot improve an answer on WikiAnswers without logging in. However, logging in is easy. All you need is a Facebook account and use that Facebook account to sign into WikiAnswers.